In a control volume system: There is no energy transfer There is no flow into or
ID: 1445794 • Letter: I
Question
In a control volume system: There is no energy transfer There is no flow into or out of the system. Energy can transfer only as heat or work Energy can transfer as flow enters and exits the system Which one(s) of the following statements apply(or applies) to a pure substance triple point There is only one triple point for a pure substance All three phases can exist in equilibrium at this point, liquid will evaporate into vapor without latent heat. it is higher in temperature than the critical pointExplanation / Answer
(4) Option (D) is the correct answer.
Explanation:
Control volume has a fixed boundary. Mass, momentum and energy are allowed to cross the boundary. We perform a balance of mass, momentum and energy that flow across the boundary and deduce the changes that could take place to properties of flow within the control volume. The shape of the control volume does not change normally. It is easy to visualise that this is a convenient approach. in fact, it is the one that is commonly used in fluid dynamics.
(5) Option (B) is the correct answer.
Explanation:
The triple point of any pure substance is that combination of temperature and pressure at which all the three phases of that substance coexists simultaneously.